Product Overview
The 269PLUS-D/O-278-100P-HI is a microprocessor-based motor management relay from GE Multilin‘s 269 Plus series, engineered as the protection backbone for critical AC motors in heavy industrial environments. As a Drawout (D/O) chassis model with 278 VAC control power and 100Ω Pt100 RTD inputs, the 269PLUS-D/O-278-100P-HI integrates comprehensive current-based protection with direct RTD temperature monitoring, delivering a dual-source thermal model that protects motors from both electrical and thermal stress .
Within GE’s motor protection portfolio, the 269PLUS-D/O-278-100P-HI occupies the upper tier of the 269 Plus family, distinguished by its high-immunity (“HI”) designation. The HI suffix denotes reinforced electromagnetic compatibility (EMC) design that prevents nuisance tripping in VFD and soft-starter environments where electrical noise is severe . The Drawout configuration allows the relay cradle to be removed from its case for hot-swap maintenance without disturbing field wiring, while the 100P suffix specifies 100Ω Pt100 RTD compatibility for precise stator and bearing temperature measurement .
A defining capability of the 269PLUS-D/O-278-100P-HI is its ability to “learn” individual motor parameters, including inrush current, negative sequence K factor, cooldown rates, start thermal capacity, and acceleration time . This adaptive thermal modeling allows the relay to fit each application precisely, rather than relying on generic protection curves that may either under-protect or cause nuisance trips. The GE 269PLUS-D/O-278-100P-HI communicates via RS-485 using Modbus RTU protocol, enabling integration with plant control and monitoring systems . With a 12-channel RTD input capacity, 4 Form C output relays, and compliance with CE and IEC 60255 standards, the 269PLUS-D/O-278-100P-HI remains a benchmark for comprehensive motor protection in power generation, oil and gas, water treatment, and heavy manufacturing applications .
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 269PLUS-D/O-278-100P-HI |
| Manufacturer | GE Multilin (GE Vernova) |
| Product Type | Motor Management Relay |
| Series | 269 Plus |
| Chassis Type | Drawout (D/O), hot-swappable |
| Control Power | 278 V AC ±10% |
| Power Consumption | 20 VA max |
| Phase CT Input | 5 A or 1 A secondary; programmable ratio up to 1500:1 |
| Ground CT Input | 50:0.025 A zero-sequence CT; 5 A CT for low-resistance systems |
| RTD Inputs | 12 channels; 100Ω Pt100 (100P); 3-wire shielded |
| Output Relays | 4 Form C (SPDT): Trip (latching, fail-safe), Alarm, Aux1, Aux2 |
| Communication | RS-485; Modbus RTU (functions 03, 04, 16) |
| Display | Backlit LCD with keypad and 5 LEDs |
| Protection Functions | Overload, Locked Rotor, Unbalance, Ground Fault, Short Circuit, Mechanical Jam, Undercurrent, Thermal Overload |
| Operating Temperature | -20°C to +60°C |
| Dimensions (approx.) | 200 × 115 × 57 mm |
| Weight (approx.) | 0.9 kg |
| Certifications | CE, IEC 60255 compliant |
